262 lines
8.4 KiB
C++
262 lines
8.4 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#ifndef ROCKSDB_LITE
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <inttypes.h>
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#include <iostream>
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#include "rocksdb/db.h"
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#include "rocksdb/db_dump_tool.h"
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#include "rocksdb/env.h"
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#include "util/coding.h"
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namespace rocksdb {
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bool DbDumpTool::Run(const DumpOptions& dump_options,
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rocksdb::Options options) {
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rocksdb::DB* dbptr;
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rocksdb::Status status;
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std::unique_ptr<rocksdb::WritableFile> dumpfile;
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char hostname[1024];
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int64_t timesec;
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std::string abspath;
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char json[4096];
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static const char* magicstr = "ROCKDUMP";
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static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
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rocksdb::Env* env = rocksdb::Env::Default();
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// Open the database
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options.create_if_missing = false;
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status = rocksdb::DB::OpenForReadOnly(options, dump_options.db_path, &dbptr);
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if (!status.ok()) {
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std::cerr << "Unable to open database '" << dump_options.db_path
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<< "' for reading: " << status.ToString() << std::endl;
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return false;
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}
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const std::unique_ptr<rocksdb::DB> db(dbptr);
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status = env->NewWritableFile(dump_options.dump_location, &dumpfile,
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rocksdb::EnvOptions());
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if (!status.ok()) {
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std::cerr << "Unable to open dump file '" << dump_options.dump_location
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<< "' for writing: " << status.ToString() << std::endl;
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return false;
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}
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rocksdb::Slice magicslice(magicstr, 8);
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status = dumpfile->Append(magicslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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rocksdb::Slice versionslice(versionstr, 8);
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status = dumpfile->Append(versionslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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if (dump_options.anonymous) {
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snprintf(json, sizeof(json), "{}");
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} else {
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status = env->GetHostName(hostname, sizeof(hostname));
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status = env->GetCurrentTime(×ec);
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status = env->GetAbsolutePath(dump_options.db_path, &abspath);
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snprintf(json, sizeof(json),
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"{ \"database-path\": \"%s\", \"hostname\": \"%s\", "
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"\"creation-time\": %" PRIi64 " }",
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abspath.c_str(), hostname, timesec);
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}
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rocksdb::Slice infoslice(json, strlen(json));
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char infosize[4];
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rocksdb::EncodeFixed32(infosize, (uint32_t)infoslice.size());
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rocksdb::Slice infosizeslice(infosize, 4);
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status = dumpfile->Append(infosizeslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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status = dumpfile->Append(infoslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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const std::unique_ptr<rocksdb::Iterator> it(
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db->NewIterator(rocksdb::ReadOptions()));
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for (it->SeekToFirst(); it->Valid(); it->Next()) {
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char keysize[4];
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rocksdb::EncodeFixed32(keysize, (uint32_t)it->key().size());
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rocksdb::Slice keysizeslice(keysize, 4);
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status = dumpfile->Append(keysizeslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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status = dumpfile->Append(it->key());
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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char valsize[4];
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rocksdb::EncodeFixed32(valsize, (uint32_t)it->value().size());
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rocksdb::Slice valsizeslice(valsize, 4);
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status = dumpfile->Append(valsizeslice);
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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status = dumpfile->Append(it->value());
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if (!status.ok()) {
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std::cerr << "Append failed: " << status.ToString() << std::endl;
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return false;
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}
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}
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if (!it->status().ok()) {
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std::cerr << "Database iteration failed: " << status.ToString()
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<< std::endl;
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return false;
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}
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return true;
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}
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bool DbUndumpTool::Run(const UndumpOptions& undump_options,
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rocksdb::Options options) {
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rocksdb::DB* dbptr;
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rocksdb::Status status;
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rocksdb::Env* env;
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std::unique_ptr<rocksdb::SequentialFile> dumpfile;
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rocksdb::Slice slice;
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char scratch8[8];
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static const char* magicstr = "ROCKDUMP";
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static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
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env = rocksdb::Env::Default();
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status = env->NewSequentialFile(undump_options.dump_location, &dumpfile,
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rocksdb::EnvOptions());
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if (!status.ok()) {
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std::cerr << "Unable to open dump file '" << undump_options.dump_location
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<< "' for reading: " << status.ToString() << std::endl;
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return false;
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}
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status = dumpfile->Read(8, &slice, scratch8);
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if (!status.ok() || slice.size() != 8 ||
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memcmp(slice.data(), magicstr, 8) != 0) {
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std::cerr << "File '" << undump_options.dump_location
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<< "' is not a recognizable dump file." << std::endl;
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return false;
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}
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status = dumpfile->Read(8, &slice, scratch8);
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if (!status.ok() || slice.size() != 8 ||
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memcmp(slice.data(), versionstr, 8) != 0) {
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std::cerr << "File '" << undump_options.dump_location
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<< "' version not recognized." << std::endl;
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return false;
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}
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status = dumpfile->Read(4, &slice, scratch8);
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if (!status.ok() || slice.size() != 4) {
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std::cerr << "Unable to read info blob size." << std::endl;
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return false;
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}
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uint32_t infosize = rocksdb::DecodeFixed32(slice.data());
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status = dumpfile->Skip(infosize);
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if (!status.ok()) {
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std::cerr << "Unable to skip info blob: " << status.ToString() << std::endl;
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return false;
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}
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options.create_if_missing = true;
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status = rocksdb::DB::Open(options, undump_options.db_path, &dbptr);
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if (!status.ok()) {
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std::cerr << "Unable to open database '" << undump_options.db_path
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<< "' for writing: " << status.ToString() << std::endl;
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return false;
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}
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const std::unique_ptr<rocksdb::DB> db(dbptr);
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uint32_t last_keysize = 64;
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size_t last_valsize = 1 << 20;
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std::unique_ptr<char[]> keyscratch(new char[last_keysize]);
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std::unique_ptr<char[]> valscratch(new char[last_valsize]);
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while (1) {
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uint32_t keysize, valsize;
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rocksdb::Slice keyslice;
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rocksdb::Slice valslice;
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status = dumpfile->Read(4, &slice, scratch8);
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if (!status.ok() || slice.size() != 4) break;
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keysize = rocksdb::DecodeFixed32(slice.data());
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if (keysize > last_keysize) {
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while (keysize > last_keysize) last_keysize *= 2;
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keyscratch = std::unique_ptr<char[]>(new char[last_keysize]);
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}
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status = dumpfile->Read(keysize, &keyslice, keyscratch.get());
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if (!status.ok() || keyslice.size() != keysize) {
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std::cerr << "Key read failure: "
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<< (status.ok() ? "insufficient data" : status.ToString())
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<< std::endl;
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return false;
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}
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status = dumpfile->Read(4, &slice, scratch8);
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if (!status.ok() || slice.size() != 4) {
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std::cerr << "Unable to read value size: "
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<< (status.ok() ? "insufficient data" : status.ToString())
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<< std::endl;
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return false;
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}
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valsize = rocksdb::DecodeFixed32(slice.data());
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if (valsize > last_valsize) {
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while (valsize > last_valsize) last_valsize *= 2;
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valscratch = std::unique_ptr<char[]>(new char[last_valsize]);
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}
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status = dumpfile->Read(valsize, &valslice, valscratch.get());
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if (!status.ok() || valslice.size() != valsize) {
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std::cerr << "Unable to read value: "
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<< (status.ok() ? "insufficient data" : status.ToString())
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<< std::endl;
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return false;
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}
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status = db->Put(rocksdb::WriteOptions(), keyslice, valslice);
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if (!status.ok()) {
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fprintf(stderr, "Unable to write database entry\n");
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return false;
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}
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}
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if (undump_options.compact_db) {
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status = db->CompactRange(rocksdb::CompactRangeOptions(), nullptr, nullptr);
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if (!status.ok()) {
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fprintf(stderr,
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"Unable to compact the database after loading the dumped file\n");
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return false;
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}
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}
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return true;
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}
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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